Damper-regulator.



J. HORN.

DAMPER REGULATOR. APPLICATION TILED MATH, 1907.

Patented Jam 3, 1911 7 SHEETS-SHEET 1.

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DAMPER REGULATOR.

APPLICATION FILED MAY 28,1907. 980,783. Patented Jan. 3, 1911.

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J. HORN. DAMPER REGULATOR. APPLIOATI OH FILED MATH, 1907.

Patented Jan. 3, 1911.

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JOSEPH HORN, OF PHILADELPHIA, PENNSYLVANIA.

DAMPER-REGULATOR.

Specification (if Letters Patent.

Patented Jan. 3, 1911.

Application filed May 28, 1907. Serial No. 376,069.

To all whom it may concern:

Be it known that I, JOSEPH HORN, a citizen of the United States, and aresident of the city and county of Philadelphia, State of Pennsylvania,have invented certain new and useful Improvements in Damper-Regulators,of which the following is a specification. I

My invention relates to improvements in means for operating dampers forstacks or chimneys and more particularly to improvements in means foroperating dampers automatically by the pressure of steam in a steamboiler, opening the damper to increase the draft upon a lowering of thesteam pressure and closing it to reduce the draft when the steampressure has been raised to a predetermined point, and the object of my1n- Vention is to furnish such an apparatus which will, by its delicacyand certainty of operating, maintain the boiler pressure atsubstantially a constant point.

In the accompanying drawings forming part of this specification and inwhich similar numerals of reference indicate similar parts throughoutthe several views :Figure 1, is a front elevation of my automatic damperregulator; Fig. 2, a side elevation of Fig. 1; Fig. 3, a plan of Fig. 1;Fig. 4, a section of flue or chimney showing damper and rods and leversfor operating it; Fig. 5, a central section of elevation through thefirst steam cylinder, showing also, in side elevation, part of the leveroperated through the cylinder, the standard to which one end of thislever is pivoted, and dial and pointer. Fig. 6, a side elevation of Fig.5; Fig. 7 a central sectional elevation of means for actuating the leverthrough which one pair of admission and exhaust valves of the damperactuating cylinder are operated; Fig. 8, a side elevation of Fig. 7Figs. 9 and 10, a front and side elevation, respectively, of the meansfor actuating the lever through which the second pair of admission andexhaust valves of the damper actuating cylin der are operated; Fig. 11,a side elevation of the main cylinder through which the damper isoperated, the valves for controlling admission and exhaust of steam toand from said cylinder, &c. Fig. 12, a central sectional elevationthrough the main or damper actuating cylinder.

1 is a main steam pipe which is connected with the bottom of the firststeam cylinder 2 within which is a piston 3, Fig. 5, the rod 4 of whichis pivotally attached at 5 to a lever 6 the inner end of which ispivoted at i i 7 to a hinged support 8. Pivoted at 9 to lever 6 is alink 10 the other end of which is pivoted at 11 to a lever 12 which ispivotally carried at 13 by a stationary support 14, which serves, also,as a guide for the outer end of lever 6 in its movements. 15 is acounterweight on the outer end of lever 12 and 16 a link the lower endof which is plvoted to the inner end of lever 12.

The upper end of the link 16 is slotted as shown in Figs. 1 and 7 at 17and through this slot passes a pin 18 which is carried by one end of avalve operating lever 19 the other end of which is furnished with acounterweight 20, or a spring, to normally close the valve which carriesthe lever 19.

21 is a valve, shown in the drawings as of the ordinary standardconstruction, which carries the lever 19; this valve is placed in 1 andcontrols the passage of steam through a steam pipe 22, which connectedwith I the main steam pipe 1, to a cylinder 23 the piston 24 of which isconnected, through a link 25, with the inner end of a lever 26 which ispivoted at 27 to a fixed support 28, Fig. 1, and furnished with acounterweight'29.

30 is a link the upper end of which is pivoted to the outer end of anoperating lever 31 of a steam Valve 32 and'the lower of which is pivotedto the outer end of an this link is slotted as shown in Figs. 1 and 10at 41 and through this slot passes a pin 42 which is carried by one endof a cock operating lever 43 the other end'of which is furnished with aspring 44 to normally close the valve 45 which carries the lever 43. TheI valve 45 is located on a steam pipe 47, connected with the main steampi e 1, and controls flow of steam to a cylinc er 48 similar inconstruction, except that its position is reversed, and operation to thecylinder 23 before referred to. The piston 49 of the cylinder 48 isconnected through a link 50 with one end of a lever 51 which is pivotedto a stand at 52 and which is furnished with a counterweight 53. Thelever 51 is en gaged by a fork or arm 54 which is carried by a link 55the upper end of which is pivoted to the operating lever 56 of a valve57 which controls exhaust of steam from upper end of cylinder 85 and thelower end of which is pivoted to the operating lever 58 of a valve 59which controls admission of steam to the lower end of cylinder Thecylinder is fitted with a piston 60 Fig. 12, and with piston rods 61passing one out of the top of the cylinder the other out of the bottom.To one of the rods 61, in the presentcase the upper one, is pivoted oneend of a link 62 the other end of which is pivoted to the middle arm ofa. T shaped lever 63 which is pivoted at 64. To the other arms of thislever 63 are pivoted. respectively. the connecting links 6566, Figs. 1,2, 4, which are pivoted, the former. to the top of a lever 67, Fig. 4.the latter to the bottom of this lever which is itself fast to a pivot68, Fig. 4, which carries the damper 69 which is located in a chimney orflue 70.

I will now proceed to describe the operation of the device and laterwill describe some of the details of construction which I believe to benovel. In the several general figures of the drawings the device isshown in a neutral position. If, now. the boiler pressure falls. thesteam pressure against the lower end of piston 3 in the first cylinder2. this cylinder being connected with the boiler by the steam main 1 asbefore described, is reduced and this piston falls a very small distancethe result of which is that the lever 6 falls and through link 10 causesthe inner end of lever 12 to fall. Owing to the arrangenu-mt of levers 6and 12 a very small movement of the piston 3 is greatly magnified at theinner end of lever 1.2. As the inner end of lever 12 falls it moves downlinks 16 and 40. the slot 41 in the latter inoperatively passing the pin42 on the operating lever 43 of the valve 45. and the link 16 draws downthe operating lever 19 of the valve 21 opening this valve and admittingsteam through pipe 22 to the top of the piston 24 in the cylinder asbest shown in Fig. 7. 11s the piston 24 is lowered it lowers the innerend of the lever 26 which through the fork or arm 36 best shown in Fig.11, lowers the link 30 which opens the steam valve 32 in the top ofcylinder 35 and the exhaust valve 34 in the bottom of this cylinder theresult being that the piston 60 of this cylinder falls and through rod61 and connected parts opens the damper 69.

As the steam pressure in the boiler rises it lifts the piston 3 in thefirst steam cylinder 2 and the operation is reversed. The inner end ofthe lever 12 rises and lifts links 16-40;

the valve 21 is closed by the counterweight (or spring) 20 and the lever26 by the counterweigl'it (or spring) 29 lifting the piston 24 andthrough the connections previously described (fork 36, which is liftedby spring 37 as soon as the downward pressure of link 26 is removed andlink 80) the valves 32%4 are closed.

Should the boiler pressure rise beyond a predetermined point the piston3 will be lifted and will lift the levers 6 and 12 which latter willlift links 1640, the former of which, owing to slot 17 willinoperatively pass the pin 18 on the operating lever 19 of valve 21, butthe latter of which will engage the pin 42 on the operating lever ofvalve 45 which will be opened admitting steam from pipe 47 which isconnected with steam main 1, to the bottom of the piston within cylinder48. The upper end of this piston (which is similar to the piston withincylinder 23) will now lift the inner end of lever 51 which engages aforkor lever 54, best shown in Fig. 11, which is carried by a link 55, whichis pivoted to the operating levers 56-58 of the valves 57-59 openingthese valves, the latter of which is in a steam pipe 47 connected withsteam main 1 and admitting steam to the bottom of the piston 60 in thecylinder 85 causing this piston and its rod to rise and through link 62,lever 63, rods 6566 and lever 67 and pivot 68, the damper 69 to close.

Upon a falling of the boiler pressure the action is again reversed, thelever 51 is lifted by the counterweight 53 and the valves 57 59 areclosed by the spring 71, Fig. 11 acting through the fork or arm 54 andthe link The steam for lifting the piston within cylinder is taken fromthe steam main 1 through a pipe m, for lowering this piston through apipe 72.

The exhaust from all of the cylinders is carried to a common exhaust.pipe 7 3. From the top of cylinder 35 the exhaust passes to pipe 7 3through a pipe 74 from the bottom of this cylinder through a pipe 75.From cylinder 23 the exhaust passes to pipe 73 through a pipe 76; fromcylinder 48 through a pipe 7 7; from cylinder 2 through a pipe 78.

In the exhaust pipe 74. leading from the top of cylinder 35, and 75,leading from the bottom of this cylinder I place hand operated valves 79which can be regulated to choke the exhaust so as to preventa too quickmovement of the piston 60 and of the damper, which latter is sometimes avery heavy affair with great momentum when it starts moving. As anadditional check upon the movements of the piston I propose to furnishit with springs 80, Fig. 12, which engaging the piston heads upon the upand down movements of the piston and connected parts act as buffers toprevent a shock in case of'a too greatly acceleratedmovement of thepiston and at the same time act after a throw I pistons are hollow, asshown at 97 and at of the piston to assist the next movement of the sameby their elasticity. If the damper be thrown too rapidly it is apt tooscillate violently and checking the exhaust from the cylinder 35 willto a great extent, or entirely, prevent this movement.

From Fig. 11 it will be seen that upon the levers 2651 are arms S182which act as indicators to show which of the cylinders 23-4c8 may be inaction, as shown in the drawings they indicate a neutral position of themechanism; if the arm 81 be lowered it shows that the cylinder 23 andconnected parts are in operation, and if the arm 82 be lifted itindicates the same thing for cylinder l8 and connected parts.

The instrument may be set to maintain any predetermined pressure intheboiler by means of the device shown best in Figs. 5 and 6. S3 is asleeve surrounding the cylinder 2 and 8% a spring carrying this sleeve.85 an arm forming part of or secured to sleeve 83 and carrying a rack 86which gears with a pinion 87 carried on an arbor 88 which carries apointer 89. 90 is a graduated dial for the pointer 89. 91 is a longsleeve which surrounds the upper part of cylinder 2 and which is securedthereto by screw threads; the under part of this sleeve bears againstthe top of the spring supported sleeve 83 and by setting this sleeve 91up or down the sleeve 83, the arm 85 and rack 86 may be set up or downto adjust the pointer 89 in reference to the graduations on the dial 90.The upper end of the sleeve 91, which forms a continuation of thecylinder 2, is furnished with perforations 92 to permit the escape ofany steam which may leak past the grooves or rings 93 of the piston 3.Bearing against the top of the piston 3 and against the under side ofthe top of the sleeve 91 is a spring 94 and carried by the reduced topof the piston 3 is a nut 95 which holds in place a packing ring 96. Inorder to lift the piston 3 the steam from the steam main 1 has tocompress the spring 9i therefore by loosening or tightening this springthe eifeotive throw of the piston is made greater or less for any givensteam pressure. The graduations on the dial 90 are made to correspondwith the boiler pressures as indicated upon a steam gage, this beingdone in the first place experimentally and afterward it is onlynecessary to bring the pointer to any one of the graduations upon'dial90, by setting the sleeve 91 up or down as may be required, to have theapparatus operate to open or close the damper as may be necessary tomaintain the boiler pressure at substantially the point indicated.

From Fig. 7, which shows the arrangement of the interiors of thecylinders 23t8 and their pistons, it will be seen how I take care of anycondensed water therein. The

the end of their stroke this hollow part connects with the exhaust steampipe through which any water held in the hollow may escape.

98, Figs. 1, 2, 3 and 11, is a yoke carried by one of the heads of thedamper actuating cylinder 35 which forms a guide for the piston rod 61;as shown in the drawings this yoke is on top of the cylinder 35, thedamper being placed above the cylinder, but it it were necessary toplace the damper below the cylinder the yoke would be secured to thelower cylinder head as shown in dotted lines Fig. 1.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. In a damper regulator, in combination, a main steam cylinder andpiston the rod of which is adapted to be connected to a damper, a steaminlet and a steam exhaust port at the top and a steam inlet and a steamexhaust port at the bottom of said cylinder, two port operatingcylinders the piston rods of which are adapted the one to operate meansfor opening and closing one set of steam and exhaust ports in said maincylinder and the other to operate means for opening and closing theother set of steam and exhaust ports in said cylinder, operativeconnections between said steam and exhaust ports in said main cylinderand the piston rods of said port operating cylinders, and means,operated by the fluctuations of the boiler pressure, for operating theadmission valves in said port operating cylinders.

2. In a damper regulator, in combination, a steam cylinder connectedwith the boiler, a piston, a series of levers for multiplying themovements of said piston, a damper, a steam cylinder, steam inlet andexhaust valves at the top of and steam inlet and exhaust valves at thebottom of said cylinder, a piston within said cylinder adapted tooperate said damper, links connecting in pairs each of said inlet andexhaust valves, a pivoted lever connected to each of said links, pistonsconnected with the free ends of said levers, cylinders carrying saidpistons, valves for controlling the admission of steam to one of ends ofsaid cylinders, operative arms carried by said valves, slot-ted linkscarried by free end of the last multiplying lever adapted on a movementof said multiplying arm in one direction to open the steam valve on onecylinder and on a movement in the opposite direction to open the steamvalve on the other cylinder, and means for normally closing said steamvalves.

JOSEPH HORN Vitnesses GEORGE IV. SELTZER, CHARLES A. BUTTER.

